6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

SECURITIES EXCHANGE ACT OF 1934

For the month of October, 2017

(Commission File No. 001-34429),

PAMPA ENERGIA S.A.
(PAMPA ENERGY INC.)

Argentina

(Jurisdiction of incorporation or organization)

Maipú 1
C1084ABA
City of Buenos Aires
Argentina

(Address of principal executive offices)

(Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.)

Form 20-F ___X___ Form 40-F ______

(Indicate by check mark whether the registrant by furnishing the
information contained in this form is also thereby furnishing the
information to the Commission pursuant to Rule 12g3-2(b) under
the Securities Exchange Act of 1934.)

Yes ______ No ___X___

(If "Yes" is marked, indicate below the file number assigned to the
registrant in connection with Rule 12g3-2(b): 82- .)

This Form 6-K for Pampa Energía S.A. (“Pampa” or the “Company”) contains:

Exhibit 1:  Letter dated October 18, 2017, addressed to the National Securities Commission (Comisión Nacional de Valores) and Buenos Aires Stock Exchange (Bolsa de Comercio de Buenos Aires), entitled “Relevant Event. Call for New Power Generation of Co-generation and Closing of Combined Cycle Projects – Res. SEE 287-E/17 – Awarding of the project Res. SEE 926-E/17.”

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: October 18, 2017

Pampa Energía S.A.
By:	/s/ Marcos Marcelo Mindlin
	Name: Marcos Marcelo Mindlin Title:   Chief Executive Officer

FORWARD-LOOKING STATEMENTS

This press release may contain forward-looking statements. These statements are statements that are not historical facts, and are based on management's current view and estimates offuture economic circumstances, industry conditions, company performance and financial results. The words "anticipates", "believes", "estimates", "expects", "plans" and similar expressions, as they relate to the company, are intended to identify forward-looking statements. Statements regarding the declaration or payment of dividends, the implementation of principal operating and financing strategies and capital expenditure plans, the direction of future operations and the factors or trends affecting financial condition, liquidity or results of operations are examples of forward-looking statements. Such statements reflect the current views of management and are subject to a number of risks and uncertainties. There is no guarantee that the expected events, trends or results will a ctually occur. The statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes in such assumptions or factors could cause actual results to differ materially from current expectations.

EX-1

Buenos Aires, October 18, 2017

Bolsa de Comercio de Buenos Aires

Comisión Nacional de Valores

NOTA PESA – LEGC /2017

Ref.: Relevant Event. Call for New Power Generation of Co-generation and Closing of Combined Cycle Projects – Res. SEE 287-E/17 – Awarding of the project Res. SEE 926-E/17.

Dear Sirs,

I am writing to the National Securities Commission (“Comisión Nacional de Valores”) and the Buenos Aires Stock Exchange (“Bolsa de Comercio de Buenos Aires”) in my capacity as Head of Market Relations of Pampa Energía S.A. (the “Company”) to inform you that the Secretariat of Electric Energy ( “Secretaría de Energía Eléctrica”) issued Resolution N° 926-E/17 through which awarded the projects that will enter into Power Purchase Agreements (“PPAs”) with Compañía Administradora del Mercado Mayorista Eléctrico S.A. (“CAMMESA”), within the Call for Projects mentioned above.

The aggregated amount of MWs selected in the tender under Resolution N° 287-E/17 was 1,304 MW, including our Genelba Plus project (the “Project”). The Project consists in the closing to combined cycle of Genelba Plus gas turbine, with an additional net power of 370 MW. Genelba thermal power plant is fully-owned by the Company. The Project includes the installation of a new gas turbine and a steam turbine as well as other enhancement works over the current gas turbine that will complete the combined cycle and reach a total power of 543 MW that implies an estimated investment of 6 billion Argentine Pesos. The commercial operation date for the Project’s open cycle is expected in the first quarter of 2019 and the closed cycle in the second quarter of 2020.

Therefore, once all undertaken expansions are finished, the gross installed capacity of the Company will amount to 4.3 GW.

Sincerely,

_________________________________
Victoria Hitce
Head of Market Relations